Three fast-working thieves emptied the shelves in a T-Mobile stock room, swiping $40,000 worth of electronics in New Dorp, making off with 85 iPads and cell phones, police said.

The suspects were caught on video surveillance sweeping the items into bags inside the store on Hylan Boulevard around 9 p.m., Aug. 30, cops said.

The trio stole about 40 iPhones, 30 Samsung Galaxy phones and six iPads, according to police.

Two suspects are believed to be in their late teens or early 20s, and the third suspect is in his 20s, officials said. The older of the three has tattoos on both forearms and he inked red lips and words on his neck, cops added.